Hello everybody:  I have purchased the Roland Octa-Capture and having trouble figuring the correct patch for running a powered sub.  I have to two front monitors and a subwoofer.  Any help is appreciated.
 
Thanks, James

Many subs have a cross over built in. In other words, you route the entire signal to the sub with the left and right sends from your sound card, mixer, etc. and the sub splits out the sub full range and then has full range outputs that you connect to the left and right speakers.
 
Maybe your sub has that sort of feature?
 
best regards,
mike

If your sub doesn't have outputs for the mains (most do but not all), you have two options: buy an electronic crossover or run the sub parallel with the mains and fiddle with the sub's crossover frequency until you find the natural drop-off frequency of your mains.

Thanks for the responses,  I am using the M-Audio SBX-10 sub which does have a built in x-over and should handle the filtering okay. I need to know how to configure the outputs on the Octa Capture to send the outs to the sub.  Sorry for my lack of knowledge on this matter.
 
Thanks, James

Hi James,
 The 1/4" TRS main outs (1 and 2) would be a suitable choice of outputs for the Octa Capture.
 
  In your DAW or music player software you simply select the Octa Capture outputs 1 and 2 for your main outs. The driver probably already calls them Main Outs in the selection list.
 
 
 
 You can use a pair of 1/4" TRS (tip, ring, sleeve) to 1/4" TRS, or a pair of 1/4"TRS to XLR male cables to make an ideal connection between the Quad Capture outputs and the SBX-10 inputs.
 
 edit to add: I see Bit suggested it below... as I was editing this... you can tweak your cross over frequency and see how the system works as whole.
 

 

 

I have the same sub. No configuration necessary, just run cables from the interface's main outs to the sub and then run two XLR cables from there to your main speakers. Your interface's outputs are probably quarter-inch TSR, so you'll need to pick up a couple TSR-to-XLR cables. Adjust the crossover frequency on the sub so it's just slightly above the low-end rolloff point of your main speakers.
 
EDIT: I see Mike beat me to it by 2 minutes, with pictures, no less! 

:-)
 
It seems like we were editing at the same time too.
 
:-)

Thanks for the quick response Mike.  I have 1 and 2 hooked up to the main front speakers BX8a's and the sub into #3 on the OC.  
Thanks, James

Hi James,
 
The idea is that you can "insert" the sub in between the Octa Capture's #1 and #2 outputs, the ones you are using now, and then daisy chain your other speakers to the sub's outputs. 
 
You don't need a separate connection from the Octa Capture #3 output to the sub.
 
Send the sub both the left and right of your entire mix. It will use its built in cross over to split off and "mono-fy" the low frequencies for the sub and send the rest through the sub's outputs to the left and right speakers.
 
best regards,
mike
 
 
 

Thanks guys you are the best, I will configure it through the sub, I appreciate your help.
 
Regards, James